Bushed pin type couplingIt is to use a column pin with an elastic sleeve (rubber material) on one end, which is installed in the flange holes of the two halves of the coupling to achieve the connection of the two halves of the coupling. The elastic sleeve pin coupling was once the most widely used coupling in China, and was formulated as a standard by the Ministry of Machinery as early as the late 1950s, JB08-60 elastic ring column pin coupling is the first partial standard coupling in China.
The structure of the elastic sleeve column pin coupling is relatively simple, easy to manufacture, does not require lubrication, does not need to bond with metal vulcanization, is easy to replace the elastic sleeve, does not need to move the half coupling, and has certain compensation for the relative displacement of the two shafts and vibration damping and buffering performance. The working of the elastic sleeve is subject to compression deformation. Due to the thin thickness and small volume of the elastic sleeve, the elastic deformation is limited. Therefore, although the elastic sleeve column pin coupling can compensate for axial displacement and elasticity, the allowable compensation amount for axial displacement is relatively small, and the elasticity is weak. The elastic sleeve column pin coupling relies on the locking force of the column pin group to generate frictional torque on the contact surface, and compresses the rubber elastic sleeve to transmit torque. Suitable for small and medium power shaft transmission systems with good base rigidity, high centering accuracy, low impact load, and low vibration reduction requirements.

LTZ (original TLL type)Bushed pin type couplingBasic performance parameters andMain dimensions

model	Nominal torque Tn (N.m)	Permissible rotational speed [n] (r/min)	Shaft hole diameter d1 d2 dz	Length of shaft hole fit			D0	D	B	S	A	Weight Kg	Moment of inertia Kg. m2
				Y-shaped	J. J1, Z-type
				L	L1	L
TLL1	125	3800	25 28	62	44	62	200	130	85	5	45	8.3	0.05
			30 32	82	60	82
			35
TLL2	250	3000	32 35				250	160	105	5		15.3	0.15
			38
			40 42	112	84	112
TLL3	500	2400	40 42				315	190	132	6		30.0	0.45
			45 48
TLL4	710	2400	45 48					224		6	65	39.6	0.50
			50 55
			56
			60 63	142	107	142
TLL5	1000	2400	50 55	112	84		315	250	168	6	65	47.0	1.26
			56
			60 63	142	107	142
			65 70
TLL6	2000	1900	63 65				400	315		8	80	92.6	1.63
			70 71
			75
			80 85	172	132	172
			90 95
TLL7	4000	1500	80 85				500	400	210	10	100	127.3	4.04
			90 95
			100 110	212	167	212
TLL8	8000	1200	100 110
			120 125				630	475	265	12	130	304.3	15.00
			130	252	202	252
TLL9	16000	1000	120 125	212	167	212	710	600	298	14	180	576.8	33.00
			130 140	252	202	252
			150
			160 170	302	242	302

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